Pith Number

pith:A4E47NRB

pith:2020:A4E47NRBLMZ5LPDITK6JYCTWDC

not attested not anchored not stored refs pending

A Self-supervised Approach for Semantic Indexing in the Context of COVID-19 Pandemic

Nima Ebadi, Peyman Najafirad

arxiv:2010.03544 v1 · 2020-10-07 · cs.IR · cs.CL · cs.LG

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{A4E47NRBLMZ5LPDITK6JYCTWDC}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-07-05T01:41:13.909625Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0709cfb6215b33d5bc689abc9c0a76189ef766e8f4667e46454e5771cb1860ef

Aliases

arxiv: 2010.03544 · arxiv_version: 2010.03544v1 · doi: 10.48550/arxiv.2010.03544 · pith_short_12: A4E47NRBLMZ5 · pith_short_16: A4E47NRBLMZ5LPDI · pith_short_8: A4E47NRB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/A4E47NRBLMZ5LPDITK6JYCTWDC \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 0709cfb6215b33d5bc689abc9c0a76189ef766e8f4667e46454e5771cb1860ef

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a69f28efb4559c058396a96714bcdc5762e9553b9c74896c18b6017c9370e4ad",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2020-10-07T17:43:55Z",
    "title_canon_sha256": "7c6b5cf0ef2d1e677448f307cfc1248a4fa02b0cbce59c7cb1aabc141e101133"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2010.03544",
    "kind": "arxiv",
    "version": 1
  }
}